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15 January, 16:17

There are

17

books on a shelf.

8

of these books are new.

(a) What is the ratio of all books to used books?

(b) What is the ratio of new books to used books?

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Answers (2)
  1. 15 January, 17:48
    0
    17 books

    You would do 17-8

    = 9 used books
  2. 15 January, 18:58
    0
    17 books in total, and 8 new. To find the number of used books, we subtract 8 from 17.

    17-8 = 9 used books

    Now we have 8 new books and 9 used books.

    All books: 17

    Used books: 9

    New books: 8

    (a) all books: used books

    17: 9

    (b) new books: used books

    8: 9
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